Ce Comments; Emc Directive; Immunity Testing - Fluke 914X Serie Manual Del Usuario

914X Field Metrology Wells

CE Comments

DO NOT allow the probe sheath or inserts to drop into the well. This type of action can cause a
shock to the sensor and affect the calibration.
The instrument and any thermometer probes used with it are sensitive instruments that can be
easily damaged. Always handle these devices with care. DO NOT allow them to be dropped,
struck, stressed, or overheated.
DO NOT operate this instrument in an excessively wet, oily, dusty, or dirty environment. Al-
ways keep the well and inserts clean and clear of foreign material.
The Field Metrology Well is a precision instrument. Although it has been designed for optimum
durability and trouble free operation, it must be handled with care. Always carry the instrument
in an upright position to prevent the inserts from dropping out. The convenient handle allows
for hand carrying the instrument.
If a mains supply power fluctuation occurs, immediately turn off the instrument. Power bumps
from brown-outs could damage the instrument. Wait until the power has stabilized before re-
energizing the instrument.
The probe and the block may expand at different rates. Allow for probe expansion inside the
well as the block heats. Otherwise, the probe may become stuck in the well.
Most probes have handle temperature limits. If the probe handle limits are exceeded, the probe
may be permanently damaged. Due to a unique Air Flow Design (Patent Pending), Field Me-
trology Wells protect the probe handle temperature and provide a safer temperature handle for
the user.
1.5 CE Comments
1.5.1

EMC Directive

Hart Scientific's equipment has been tested to meet the European Electromagnetic Compatibili-
ty Directive (EMC Directive, 89/336/EEC). The Declaration of Conformity for your instrument
lists the specific standards to which the instrument was tested.
The instrument was designed specifically as a test and measuring device. Compliance to the
EMC directive is through IEC 61326-1 Electrical equipment for measurement, control and
laboratory use.
As noted in the IEC 61326-1, the instrument can have varying configurations. The instrument
was tested in a typical configuration with shielded RS-232 cables.
1.5.2

Immunity Testing

Using Clamp-On Ferrites
For the –P model only, clamp-on ferrites are provided for use in improving its electromagnetic
(EM) immunity in environments of excessive EM interference. During EMC testing we found
that ferrites clamped around probe cables for the Reference PRT, the PRT/RTD input, and the
thermocouple (TC) input reduced the risk the EM interference affects measurements. Therefore,
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